Perhaps you should try some spelling variations:
yao yoong » yao yudong, yao yang
chang ann » chang min, chang won, chang yun
chang mae » chang ha, changes made
jeong shu » jeong su, cong shu
wang yao » wang yan, yang yao, gang yao
yoong yi » yoong pui, yang yi, chong yi
yi chen » jui chen

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang yao yoong yi chen ((chang ann) or (chang mae)) jeong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yao yoong yi chen ((chang ann) OR (chang mae)) jeong shu ;.
• Adding a wildcard symbol may retrieve word variants: wang yao yoong yi chen ((chang ann) or (chang mae)) jeong shu ;*.